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101

TC35i AT Command Set

9.8 AT+CHLD

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TC35i_ATC_V02.07 Page 230 of 439 1/30/04

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9.8 AT+CHLD Call Hold and Multiparty

Syntax

Command Description

TA controls the Supplementary Services Call Hold and Multiparty. Calls can be put on hold, recovered, released,

and added to a conversation.

Like for all Supplementary Services, the availability and detailed functionality of Call Hold and Multiparty services

depends on the configuration of the GSM network. The TC35i can only request the service, but the network

decides whether and how the request will be answered.

Parameter Description

0 Release all held calls or set User Determined User Busy (UDUB) for a waiting

call:

• If a call is waiting, release the waiting call. The calling party will receive a

"BUSY" indication (Supplementary Service User Determined User Busy

"UDUB")

• Otherwise, terminate all held calls (if any).

1 Terminate all active calls (if any) and accept "the other call" as the active call:

• If a call is waiting, the waiting call will be accepted.

• Otherwise, if a held call is present, the held call becomes active.

Test Command

AT+CHLD=?

Response(s)

+CHLD: (list of supported <n>s)

Write Command

AT+CHLD=[<n>]

Response(s)

ERROR

+CME ERROR: <err>

PIN ASC0 MUX1 MUX2 MUX3

% % % % %

Reference(s)

GSM 07.07

<n>

(num)

1 2 ... 225 226 227 228 229 230 231 232 233 234 235 ... 438 439

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